/* ===================

AX2E (AXESCON XACML 2.0 Engine) is the Java authorization engine, which implements OASIS XACML 2.0 standard.
Copyright (C) 2007 AXESCON LLC

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA


Contact: AXESCON LLC - info{at}axescon.com

 =================== */
package axescon.xacml.api.alg;

import axescon.xacml.api.CtxHandler;
import axescon.xacml.api.XacmlException;
import axescon.xacml.engine.PolicyEvaluatorImpl;
import axescon.xacml.model.ctx.Result;
import axescon.xacml.model.ctx.XacmlCtx;
import axescon.xacml.model.policy.PolicyCombinerParameters;
import axescon.xacml.model.policy.PolicyProxy;


/**
 * @author argyn
 *         Date: Jun 26, 2005
 *         Time: 11:35:03 PM
 *         Responsibilities:
 */
public interface PolicyCombAlg {
    public Result combine(PolicyProxy[] policies, XacmlCtx req, CtxHandler ch
                          , PolicyCombinerParameters[] params
                          , PolicyEvaluatorImpl pdp) throws XacmlException;

    public static final String DENY_OVERRIDES = "urn:oasis:names:tc:xacml:1.0:policy-combining-algorithm:deny-overrides";
    public static final String PERMIT_OVERRIDES = "urn:oasis:names:tc:xacml:1.0:policy-combining-algorithm:permit-overrides";
    public static final String FIRST_APPLICABLE = "urn:oasis:names:tc:xacml:1.0:policy-combining-algorithm:first-applicable";
    public static final String ONLY_1_APPLICABLE = "urn:oasis:names:tc:xacml:1.0:policy-combining-algorithm:only-one-applicable";
    public static final String ORDERED_DENY_OVERRIDES = "urn:oasis:names:tc:xacml:1.1:policy-combining-algorithm:ordered-deny-overrides";
    public static final String ORDERED_PERMIT_OVERRIDES = "urn:oasis:names:tc:xacml:1.1:policy-combining-algorithm:ordered-permit-overrides";

    public static final String[] MANDATORY_POL_COMB_ALGS = new String[]{
        DENY_OVERRIDES,
        PERMIT_OVERRIDES,
        FIRST_APPLICABLE,
        ONLY_1_APPLICABLE,
        ORDERED_DENY_OVERRIDES,
        ORDERED_PERMIT_OVERRIDES
    };

}
